| PERICARDIAC | • pericardiac adj. Alternative form of pericardial. • PERICARDIAC adj. relating to the pericardium, a membranous sac containing the heart, also PERICARDIAL, PERICARDIAN. |
| PERICARDIAL | • pericardial adj. (Cardiology) Of, or relating to the pericardium. • pericardial adj. Surrounding or next to the heart. • PERICARDIAL adj. relating to the pericardium, a membranous sac containing the heart, also PERICARDIAC, PERICARDIAN. |
| PERICARDIAN | • pericardian adj. Alternative form of pericardial. • PERICARDIAN adj. relating to the pericardium, a membranous sac containing the heart, also PERICARDIAC, PERICARDIAL. |
| PERICARDIUM | • pericardium n. (Anatomy, cardiology) A serous membrane that surrounds the heart allowing it to contract. • PERICARDIUM n. a membranous sac containing the heart. |
| PERICARPIAL | • pericarpial adj. (Botany) Of or relating to a pericarp. • PERICARPIAL adj. relating to the pericarp, also PERICARPIC. |
| PERICENTERS | • pericenters n. Plural of pericenter. • PERICENTER n. the point in the path of a body revolving round a centre at which it is nearest to the centre, also PERICENTRE. |
| PERICENTRAL | • pericentral adj. Surrounding the centre. • PERICENTRAL adj. surrounding a centre or central body, also PERICENTRIC. |
| PERICENTRES | • pericentres n. Plural of pericentre. • PERICENTRE n. the point in the path of a body revolving round a centre at which it is nearest to the centre, also PERICENTER. |
| PERICENTRIC | • pericentric adj. Pericentral. • pericentric adj. (Astronomy) Of or pertaining to a pericentre. • pericentric adj. (Genetics) Of or pertaining to the centromere of a chromosome. |
| PERICHAETIA | • perichaetia n. Plural of perichaetium. • PERICHAETIUM n. a sheath or cluster of leaves around the archegonia in mosses and liverworts. |
| PERICHYLOUS | • PERICHYLOUS adj. of a plant, having water-storing tissue outside the green tissue. |
| PERICLASTIC | • PERICLASTIC adj. like a periclase, a naturally occurring magnesium oxide. |
| PERICLITATE | • periclitate v. (Obsolete) To endanger. • PERICLITATE v. (archaic) to endanger; to jeopardise. |
| PERICRANIAL | • pericranial adj. (Anatomy) Of or pertaining to the pericranium. • PERICRANIAL adj. relating to the pericranium, a membrane covering skull. |
| PERICRANIUM | • pericranium n. (Anatomy) The membrane (or periosteum) which covers the outer surface of the skull. • pericranium n. (Humorous, now rare) The head, skull; one’s mind. • PERICRANIUM n. a membrane covering the skull. |
| PERICYNTHIA | • PERICYNTHION n. the point at which a spacecraft in lunar orbit is nearest to the moon. |